ctr: move snapshot command

Signed-off-by: Jess Valarezo <valarezo.jessica@gmail.com>

cmd/ctr/main.go

@@ -10,6 +10,7 @@ import (
 	"github.com/containerd/containerd/cmd/ctr/commands/content"
 	"github.com/containerd/containerd/cmd/ctr/commands/images"
 	"github.com/containerd/containerd/cmd/ctr/commands/plugins"
+	"github.com/containerd/containerd/cmd/ctr/commands/snapshot"
 	versionCmd "github.com/containerd/containerd/cmd/ctr/commands/version"
 	"github.com/containerd/containerd/namespaces"
 	"github.com/containerd/containerd/server"
@@ -85,7 +86,7 @@ containerd CLI
 		pushObjectCommand,
 		rootfsCommand,
 		runCommand,
-		snapshotCommand,
+		snapshot.Command,
 		tasksCommand,
 	}, extraCmds...)
 	app.Before = func(context *cli.Context) error {